Lubricating device



' 2 Sheets-Sheet 1 June 8, 1937.l G. s. Roer-:Rs

' LUBRIATING-DEVICE Y `Filed Nov, 14, 19:54-.'

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Jane 8,1937.y

G. s. Rosi-:Rs

LUBRI CATNG -DEVICE Filed Nov. 14, V1934 y 2 Sheets-Sheet 2 -Patented June 8, 1937 UNITED STATES" My invention relates to lubricating devices andr particularly, to the'combination of a dispensing gun, a fitting or grease cup adapted to receive lubricant from the gun, and an adapter on the gun for engaging the fittingI and making a fluid-A tight joint therewith. i

Theobject of the'invention is to provide a lubricating device whichA canv be manufactured at a vrelatively small lcost and which,at the Sametime,

will be capable of dispensing'under relatively high pressure. A further object of the invention 'is tov provide ,means for readily connecting and dis` connecting the adapteron the 1 gun to the ttingto be supplied with lubricant, and locking the joint mechanically during 'the dispensing operation. Another object of the invention is to vprovide a dispensing gun vwhich can easily be filled with lubricant, an adapter designed to make locking engagement with thefiitting,` and afiitting provided with a suitable closure and means for preventing the closure from being'forced out of the fitting by the pressure of the lubricant supplied thereto. I f l ,y 1

'For a complete'unrstanding of the invention, reference is made to the'accompanyingdrawings illustrating a present preferredv embodiment of the invention with certain modifications thereof,

In the drawings: l l u u u, 1 Figure 1 is a longitudinal sectionofa'dispens'- soins gun; I i y Figure 2is a. longitudinal sectionof theadapter with *which the gun is provided, and a fitting in engagement withtthe adapter; n Figure 2A is an en d elevation of the adapter 35, with the fitting removed therefrom; u l

Figure 3 isan elevation of the fitting; Y Figure liis a sectional view similar to Figure 2 showing a modifiedformjof fitting; y '1 Figure 5 is' a view showing a sofcalled udrif/e- 40011 ntting; i l gv u Figure 6 is ajside elevation partly in section showing a modiied f orm vof dispensing device;

Figure `'7 is a similar View showing'a further modication; f Figure 8 is a view similar to Figure 2 showing a further modiiication; and y Figure k9. is akpartialview similar to Figure 1 showing a modification of a portion ofjthe apparatus.

yReferring now inv-detail tothe drawings and,

forthemre'sent, to Figure TLthe gun' indicated generally at Ill comprises la' cylinder" II -and a quick detachable base-I2 at onel end thereof vand `aconical head I3 threaded Vonthe other end.*-A tube-I4 is threaded into the Vhead `13,v .Y

A rod I5 extends Lthroughk ther base I2.; A

lplunger or ram I6 -swiveled to the innerendiof the-rod I 5 at I1 reciprocate's'fin the tube'l 4.j Ag.' piston I8 vis slidable on the rod I5.and is pro- `vided`with packing I9 forming .atight joint' therewith. f A

1 The base I2 has a quick 'detachable connection with the cylinder yI I, such asabayonet joint20. Projectionsr2l may convenientlybe pressedA out of the `cylinder wall to cooperate with ,the slots in the base I2. A stop ring 22 is pressedinternally of the cylinder walll to provide retraction of the ypiston I8 Itherebeyond. A spring 23v normally urges the piston toward the conical head I3. The gun is filled by removing the conical head I3'and`the base I2 from the cylinder I I. pin 24 limits the rearward movement ofthe head I2'on the rod I5 tov prevent injury to the users` hand whengripping the handle 25. The threaded end of the cylinder' I'I is inserted in a supply oflubricantv and the piston I8 'is'then retracted by i PATENT," CIE: u Eff f A stop pulling back on the handle25." Lugs-ZG pressed 1 out of the rod `'engage the piston and move it vrearwardly on retraction of the rodv I5. Lubrl'- cant `enters the ycylinder on. rearwardA movement of thel piston therein andywhen'thecylinder is full, the conical-head I3 is replaced. The base I 2 isthenv attached to the "cylinder, the spring 23 being compresesd by this operation, and placing the charge Oflubricant in the cylinder junde pressure. The rod I5 may'then bethrust forward until'the plunger IIVenter's the tube I4,"as shown. Manual reciprocation of the rodY I 5 will now'cause' lubricant to be discharged from' the tube' I4. As the rod I5 is withdrawn, `the plunger I6 leaves the tubeIL- whereupon lubricant isY forced into the tube under they pressure exerted by the spring 23 onthe pistoni 8. When the rod I5 is ,theirA thrust forward, rany desired pressure may be applied manually to the lubricant within `the tube y I4 to cause it tobe discharged into any desired receptacle.

" A convenient formvof lubricant receptacle isv shown-:ln- Flgure 2,- togetherwith an adapter `by which the gun of Figure 1 mayy readily be con- I4, or a-threadedconnection on a conduit at- 'tacheduto'theftube-H,` a barrel k32 threaded into the 'sleeveflgaandia sleeve 33` threaded into the barrel 32.' f The barrel 32 is provided with atube nected toand disconnected from therec'ept'acle.`

The adapter, indicated generally at 30,y may be connected directly to the tuber I4 of vFigure 1, or

' 2' s,oas,oss

34 which is slidable therein and has a blunt contact point -33 for engagement with a iltting. indicated generally at 33. The inner end of the tube 34 is provided with a cup washer 31 whereby the pressure applied on the lubricant delivered to the adapter causes the point 33 tightly to engage the iltting 33. A plurality of chucking members 33 are mounted in the end of the sleeve 33 and have h inturned lips 33 adapted to enter a peripheral groove 40 formed adjacent the endof the iltting 33 back of a hemispherical head 4I. The chucking members have tapering surfaces 42 which cooperate with the tapering inner wall 43 of the sleeve 33 adjacent its outer end. The members- 33 is normally maintainedon its seat by a spring 5I. The spring rests on an inturnedlip 32 adjacent the inner end of` the fitting. Initially. this lip extends outwardly, as shown in dotted lines. After the closure 33 and the springl have been positioned inthe bore, however, `the lip 32 is turned inwardly and constitutes means positively preventing ythe closure and its spring from being forced through the bore by the pres-v sure on the lubricant supplied thereto.4v

The adapter 33 may be connected to the fitting 35 33 simply'by pressing the adapter over'the end of. the fitting. While theinternal diameter of the* lip 39 is normally less than the maximum diameter of the head 4I, the chucking members 33 spread slightly when pressed inwardly of the 40 sleeve 33-against the v4pressure ofthe spring V44. 'I'his permits the chucking members to snap over the head 4l so that the lips 3 3 enter the groove 40. If pressure is now applied to the lubricant in .the adapter, by pressing `:forward the handle of a gun suchasthat of Figure 1 to which the adapter isconnected, the tube 34 is driven into tight engagement with the head 4I of the fitting 33, because the pressure is lexerted on the an-` nular surface ofthe cup washer 31. A ball check valve 33 prevents reversal of [the flow of lubricantthrough theadapter.v the point 33 ofthe tube 34 engages the head of the fitting 33,5

the pressure on the lubricant causes Aa reaction tending tomove thebarrel 32 andsleeve 33 away iromtheiitting.` 'Ihis movementl of the sleeveV 33, by reason of. the'engagement of its tapered inner wall 43 with the tapering outer surfaces 42 of the chuclring members 33, causes the latter to contract and grip the fitting tightly. l'I'he pressure on the lubricant, of course, displaces the ball closure 3l!k so that 'the lubricant illls the enlargement -43' ofsthe bore through .the fitting. When the fittingy has Vbeen filled, releasingy the pressure on the lubricant beingdispensed. it .will permit retraction of the tube 34 and remove the reactive force on the barrel 32 and the sleeve 33. This gives ,the chucking members sufficient free movement to expand so they pass' over the head 4| of the fitting 33. The operation of cony necting the .adapter to the fitting and of disconnecting it therefrom, is obviously very simple and can be performed very quickly. At the same time, the connection, when once made, is-iirmly l established against accidental displacement and the-greater the pressure on the lubricant, the

.shown in Fig-ures 3 and 4.

coupler is connected thereto, in the manner inditighter the chucking members will hold the ntting.

A modified form of fitting is shown in Figure 4. This tting differs from that of Figures 2 and 3 in that a closure seat 30 is formed between 5 the enlargements 43 and 43 of the bore 41. A closure 6I is held against the seat by a spring 32 which is supported in the tting in the same manner as the spring 5I of Figure 3.

Figure 5 illustrates a so-called drive-on" ilt- 1o ting 65 having a head 66 and an undercut groove 31 similar to corresponding parts of the fittings The tting 33 is adapted to be forced into an opening 33 in a receptacle 39 having a closure seat 13, a closure 15 1I; and a spring 1.2 arranged as shown in Figure5. The fitting 35 thus constitutes a terminal for the receptacle 69, by which it may be supplied with uid from a gun having thereon the adapter of Figure 2. ,v 20

Figure 6 shows a dispensing gun capable of one-hand operation. The body of the gun is similar in construction to Figure l, the only difference being that the'base. I2 has a gripping disc 15 secured thereto by means of a tube 13 25 through which thepiston rod I3 slides. The end of the rodV i5 is provided with a cooperating, gripping disc 11. A spring 13 between the discs tends toretract the piston rod I5 from the cyl-v" inder Il. This, ofcourse, withdraws the plunger 30 i3 from the tube |14..V The operation of the device shown in .Figure 6 obviously is effected by gripping the disc 15 with the fingers and pressing the disc 11 toward it with the palm of the hand. When -a dispensing operation has been com- ,35 pleted, the spring 13 retracts the piston rod Il and the plunger; I3.` By thisconstruction, a pressure of approximately 5060# per sq. in. may easily be applied to the lubricant to be dispensed. the operator using only one hand to manipulate o the dispenser. y I.

Figure 7 is Aa'view similar to Figure 6 showing a gun provided with finger hooks 13 instead of the discs 15. The hooks,13 may constituteV a single stamping and be attached to the base I 2' 5 inanyjy convenient manner, for example, by a shouldered'sleeve 30 adapted to have its inner end expandedover'the edge ofthe hole in the base I2', in the samemann'er as shown for the tube 13 of `Figure 6. .The operation of the device of Ilgure 5 '1,V of course, is the same as that of Figure 8.

Figure 8 shows a `coupler which is similar in all respects to'that of Figure 2 except that the v tube'34' thereof 'has a pointed end 33 which is adapted to enter the bore in a fitting when the 55 cated by dotted lines InFigure 8.

Figure 9 illustrates a slightly modified form of piston and packing for the piston rod. InFlgure 9, the piston I3 is carried on a sleeveill ywhich is bored to receive the piston rod I3. The sleeve 3| is also bored to receive packing and is internally threaded to admit a packing-compressing plug 32 to constitute a packing gland.

'I'he advantage of the construction of Figure 9 is that it permits the piston I3' to travel to the end of the cylinder Il, thuspermitting it to dischargepractically all the material in the gun.

It will be apparent from the foregoing descrip- `tion that the invention provides a relatively inex- 70 pensive yet highly eiiicient lubricating lsystem comprising a lubricant receptaeleadapted to be screwed into the part or machinery to be lubricated, a dispensing gun, and an adapter by which the gun may be connected to the receptacle. -The 75 inventionl is capable of delivering iiuid under very high pressures, such as 10,000 lbs. per sq. in.. and yet is so simple and easy to operate that it can be used satisfactorily by persons of very limited mechanical skill. Use of thai-device is further facilitated by the factl that orte-hand operation thereof is possibleff-f Although I have illustrated anddescribed herein but one preferred form of the invention, together with certain modificationsv thereof, it will be apparent that numerous changes in the construction disclosed herein may be made without departing from the spirit of the invention or the scope of theappended claims. ,i

Cil

I claim: v;

1. An adapter for engaging 8;-iitting end, comprising a cylindrical body with` a bore therethrough, gripping jaws mounted adjacent one end of the body and movable radially thereof, a tube lying in said' bore with the one end between said jaws and slidable axially thereof an abutment extending inwardly from said'bodf into said bore, a spring compressed between sai abutment and said jaws, and means exerting radial pressure on the jaws on retraction of the body.

2. The apparatus dend by claim 1 characterized by said abutment and said jaws guiding the tube in its movement axially of said bore.

3. The apparatus deiin'ed by claim 1 characterized by a piston carried by fsaid'tube adjacent the end remote from the jaws, a ball checkin the inlet end of the body, and a spring compfessed between said .piston and said ballchech, y,= y

sealing engagement with the interior of normally so to position 4. 'I'he apparatus dened by claim 1 characterized by said spring being disposed in` said bore but externally of'said tube. r y

5. Theyapparatus deilned by claim 1 characterized by said abutment being an annular shoulder on which said'tube is slidable.

6. A'coupler for dispensers, adapted'to engage al headed fitting and comprising a tubular body, a check-valve seat adjacent one end thereof, a plunger reciprocable therein, a washer making the body, a checkkvalve on said seat, 'a spring urging the ,washer into abutment with the plunger and said valve on its seat, gripping jaws movably carried between the plunger and the body. the contacting surfaces of the jaws and body being shaped to a spring surrounding theplunger and effective body that the jaws will be contracted.

7. A` coupler for connecting dispensers to; headed ttings, comprising 'a tubular nose piece contracted at one end, 'a plurality of gripping jaws disposed in said end for radial and axial movement, a plunger within said jaws, a spring on said lunger effective to urge the jaws toward said contracted end, a check-valve seat secured in the other end of said, nose piece, a valve on said seat, a sealing washer abutting the end of said plunger remote from saidcontracted end, and a. spring betweensaid valve and washer.

- z GERALD S. ROGERS.

the jaws relative to the y cause radial movement of the jaws on relative4 axial movement between the. jaws and body, and 

